Who doesn’t love JULIA ROBERTS' big, BIG tips?

JULIA ROBERTS uses a service that picks up fresh organic produce from a Santa Barbara farm and delivers it to her Malibu home, and she always tips the young delivery guy a crisp $100 bill – but when he showed up at her house dripping with sweat, she asked if he was feeling ill.

Said an insider: “The guy apologized and told Julia he’d simply been sweating because the air-conditioning in his car has been broken for days.

"Julia nodded, took her produce, then handed the guy his tip – a check for a whopping $500 – and told him: ‘Get your air-conditioning fixed now…it’s on me!’”